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Evaluation of Commercial Olive Accessions for Resistance to the Olive Knot Disease Caused by Pseudomonas savastanoi pv. savastanoi

  • Research Article-Biological Sciences
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Abstract

Selection of olive cultivars resistant to Pseudomonas savastanoi pv. savastanoi (Psav) is an important measure toward the management of olive knot disease. In this work, we report on the response of selected olive cultivars resistant to infection by Psav. Olive cuttings were regenerated from 142 unique accessions representing 91 cultivars of oil and table olives originated from 30 countries. The seedlings were inoculated using an exacto blade dipped in a liquid suspension of Psav (OD 0.2; ~ 1 × 108 CFU/ml) and maintained in the greenhouse for three months. Measurements of knot sizes showed variable response of the olive genotypes to bacterial inoculation. Based on knot size, olive accession Dole 23, genotype Souri from Ancient Palestine was the most tolerant to olive disease with smallest knot size (4.5 mm). The largest knot size (18.4 mm) was recorded on accession Dole 65, genotype Barnea from Israel. All olive subspecies did not differ significantly in their response to artificial inoculation with the P. savastanoi pv. savastanoi.

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Acknowledgments

The financial support from the Arab Fund Fellowship Program to the first author is highly appreciated. The research was partially supported by USDA-CDFA Specially Crop Block Grant and USDA-ARS CRIS project 2032-2200-016-00D

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Authors and Affiliations

  1. Department of Applied Molecular Biology, Palestine Technical University-Kadoorie, Tulkarm, State of Palestine

    Ruba Abuamsha

  2. USDA-ARS Crops Pathology and Genetics Research Unit, University of California, Davis, CA, 95616, USA

    Daniel Kluepfel & Ali McClean

  3. Department of Agricultural Biotechnology, College of Agricultural Science and Technology, Palestine Technical University-Kadoorie, Tulkarm, State of Palestine

    Mazen Salman

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  1. Ruba Abuamsha
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  2. Daniel Kluepfel
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  3. Ali McClean
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  4. Mazen Salman
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Correspondence to Mazen Salman.

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Abuamsha, R., Kluepfel, D., McClean, A. et al. Evaluation of Commercial Olive Accessions for Resistance to the Olive Knot Disease Caused by Pseudomonas savastanoi pv. savastanoi. Arab J Sci Eng 49, 87–95 (2024). https://doi.org/10.1007/s13369-023-08054-7

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